Apparatus for compounding lubricating oils



Aug. 25, 1936. c. M. ALEXANDER 2,0511932 APPARATUS FOR COMPOUNDING LUBRICATING OILS Original Filed May 2-3, 1931 3 Sheets-Sheet l I 4 Y FJ 2 mvz TOR 6 C/rre lexander A-fToRNEYs Aug. 25, 9 c. M. ALEXANDER- 2,051,932

APPARATUS FOR COMPOUNDING LUBRICATING O ILS INVENTOR [fire M Ilexqnc/er ATTORNEYS 1936- c. M. ALEXANDER 2,051,932

APPARATUS FOR COMPOUNDING LUBRICATING OILS Original Filed May 23, 1931 3 Sheets-Sheet 3 W Rd Y Bx 3 Wm V/ T 4 %Y .B C

Patented Aug. 25, 1936 UFNITED STATES APPARATUS ron. COMPOUNDING wamoa'rmo on.s

Clive Morris Alexander, Webster Mo.

Application May 23, 1931, Serial No. 539,501

- Renewed .October 4, 1934 A 14 Claims. ((1221-96) This invention relates to apparatus for compounding or forblending lubricating oils. It is one of the purposes of the present invention to provide an apparatus adapted to accurately compound lubricating olls of diil'erent viscositles in Z predetermined proportions to produce oils having desired predetermined viscosities, the operation of such apparatus being entirelysfree from irregularities encountered in the usual blending operation through the personal equation of the operator.

In the operation of petroleum refineries for the manufacture of lubricating oils, the finished lubricating oils may be obtained either by direct fractionation to produce an oil 01' thedesired physical properties, or by the fractionation of two or more stocks followed by compounding or blending of these'stocks in predetermined proportions. The majority of lubricating oils for use in the automotive trade and for use in lubri-. cating industrial machinery are prepared by compounding lubricating oil stocks. Because of the fact that anumber of diii'erent grades of oil are required indifferent industries and especially in the lubrication of automobiles, there is at the present time a tendency to establish certain difierent grades of lubricating, oils in accordance with the Society of Automotive Engineers speciflcation and to identify the diiterept grades by diii'erent numbers. There are at present seven S. A. E. grades corresponding to the recognized numbers 10, 20, 30, 40, 50, wand '10, the viscosi ties of which progressively increasein the order named. The lower number designating a relay 'tively light oil of low viscosity and the higher numbers designating relatively heavy oils of high viscosity. Thisentire range of lubricating oils can be produced by compounding two well established lubricating stocks manufactured by the refineries known respectively as neutral stocks and bright stocks.

This compounding or blending is either done at the refinery or at the iobber's bulk plant and the various grades are then furnished to the retailer as the trade demands. However, regardto start with a few lubricating stocks and from these make up his entire trade requirements of lubricating oils, his operations are much simpliiied and his costs greatly reduced if he can through small investment carry two or three lubricating stocks and manufacture therefrom, by compounding, all of the grades of lubricating oils required, for example, for automobiles, tractors and other industrial machinery. These same advantages could be carried still further to the retail service station operator if it were practical for him to carry only lubricating stocks oi. say a light and a heavy grade and from these compound directly the various lubricating oils required by the consumer.

The present invention consists of -a novel assembly of apparatus comprising two storage tanks, one "for light lubricating stock and the other for heavy lubricating stock, together with proportioning apparatus adaptedto eflect compounding of these stocks in predetermined proportions and dispensing means whereby finished lubricating oils of the various desired grades can be obtained directly as-required- The invention can best be described with reference to the accompanying drawings, but it will be understood that these drawings are merely tor the purpose of illustration and that the invention is not limited thereto.

Figures 1 and 2 are diagrammatic illustrations in elevation of two generally similar types of apparatus embodying one form of the invention.

Figures 3 and 4 are diagrammatic illustrations in elevation oi two generally similar types of apparatus embodying a modifled'iorm oi the invention. v

Figure 5 is an elevation partly in section of one type of reciprocating proportioning device comprising two positive displacement proportioning elements synchronized so as to operate in a predetermined fixed relationship.

Figure 6 is an elevation partly in section of 7 another type of proportioning device comprising two positive displaoementproportioning elements of the rotarytype, synchronized so as to operate in a fixed predetermined relationship.

Referring to Figure 1; A and B are stor e receptacles which may contain widely diverg'nt grades of lubricating oil stocks. For example,

the oil in A may be the lightest lubricating oil which it is desired to have available; whereas the oil in B may be the heaviest lubricating oil which it is desired to have available. The characteristics of these two oils would depend upon the limits of the range of grades or oil which it is desired to produce. Receptacles A and B may be provided with vents I and 2 and gauge glasses 3 and l for observing thecontents of the receptacles and with valve controlled connections I and 6 for ill!- ing the receptacles. Connection I communicates with the receptacle A and is provided with a con- 1 trol valve 30 through which oil from the receptacle I3 communicates with the receptacle 0 and is provided with a control valve 23 so that oil may be dispensed directly from tank C as desired. Storage tanks D, E, F, and G are similar to tank C and similarly equipped with vents lland gauge glasses l9. 1

Proportioning devices II and ii are arranged to discharge into storage tanks D and E respectively through valve controlled connections l6 and I1. Proportioning device ll communicates on one inlet side with receptacle A through connections I and and on the other inlet side with tank 0 through connections I: and 2|. Proportioning device I5 communicates on one inlet side with receptacle B through connections; 8 and 22 and on the other inlet side with receptacle C through connections I: and 23. Storage tanks D and E are provided with discharge connections 24 and 25, respectively, and these discharge connections are provided with control valves 3| and 35 respectively, in order that oil may be dispensed from storage tanks D and E directly. Proportioning devices 26 and 21 are arranged to discharge into storage tanks F and G respectively through valve controlled connections 28 and 29. Proportioning device 28 communicates on one inlet side with storage tank Dthrough connections 24 and 31 and on the other inlet side with storage tank C through connections l2 and 28. Proportioning device 21 communicates on one inlet side with storage tank C through connections l3 and 29 and on the other inlet side with storage tank E through connections and 40. Storage tanks F- and G are provided with discharge connections ll and 42 respectively which are in turn provided with control valves 32 and 20 through which oil may be dispensed from storage tanks F and G directly- The proportioning devices 9, l4, I5, 26, and 21 each consist of a pair of positive displacement proportioning elements, the two elements of each pair being synchronized to transfer liquids in a fixed predetermined ratio. proportioning elements may be any of the well known types of reciprocating proportioning pumps having a definitely fixed length of stroke. The transmission ratio of the elements of a pair may be fixed by varying the relative sizes of the elements and providing an arrangement to drive them at the same speed, or the separate elements of a pair may be or the same size and provided with means for driving them at speeds having a definite fixed ratio. The-elements of a pair for example may be connected to a common driving mechanism, either directly so as to drive them at the same speed, or through gears so as to drive them at diflerent speeds in the desired ratio. The proportioning devices may bedriven by power supplied from an external source; for example, an electricmotonortheymaybeactuatedbythe application of pressure to the oil supplied to the inlet sides of the proportioning devices. This pressure may be applied for example by gravity where the storage receptacles A and B are eleor through gears so as to maintain a fixed ratio oi. transmission. As the-details of various types of positive displacement proportioning pumps and meters areknown to the art and the present invention is not dependent on the use of any particular type, the proportioning devices are only I conventionally illustrated in the drawings.

The apparatus illustrated in Figure'2 is generally similar to that indicated in Figure 1 except'that no storage tanks are provided for the intermediate grades of oil and the proportioning devices 9, ll, I5, 28 and 21 are arranged to discharge directly into connections I3, 24, 25, ll and I2, respectively. In the apparatus illustrated in Figure 2 the storage receptacles A and B are provided with valve controlled connections 53 and 54 respectively which are adapted to supply air pressure to the upper surfaces of the liquids in the storage receptacles. In

this arrangement pressure reliei valves 55 and 3 56 are substituted in place of the vents l and 2 shown in Figure 1.

In the operation oi. the apparatus illustrated in Figure 1, any one of the intermediate storage tanks C, D, E, F, and G is filled by opening the valve in the discharge connection. leading .Iro'm the proportioning device to the desired storage tank and 'by' supplying actuating power to the corresponding proportioning device.

where the storage receptacles A-and B are elevated with respect'to the intermediate storage tanks and the proportioning devices are 01 the type which may be actuated by the application of pressure to the oil supplied to the inlet sides of the proportioning devices it is only necessary to open any one oi the control valves I2, l6, l1, 2|, or 29, in order to supply liquids in the desired predetermined ratio to any one of the storage tanks C, D, E, F, or G, respectively.

In the arrangement illustrated in Figure 2,

where no intermediate storage receptacles are provided, the proportioning devices preferably are of the type that may be actuated by the application of pressure to the oil at-the :inlet side oi! the'proportioning elements, as otherwise it would be necessary to supply power simultaneously to the proportioning device 9 as well as to the proportioning device I in order to dispense an appropriately blended oil through connection 24. Similarly, it would' be necessary to sup ply power simultaneously to' each of the proportioning devices 9, II and 2G in order to dispense an appropriately blended oil through connection ll. However, it the proportioning devices are of the type that may be actuated by the application of pressure to the oil at the inlet side oi the proportioning elements, :it is only necessaryto open any one of valves 3|, 32, 23, 3|, or 25, in order to-automatically dispense-an oil" of the appropriate blend Irom the desired discharge tion a blend consisting, or 65% of oil supplied connection. For exampleQopening 01' valve 33 will cause the proportioning device 9 to dispense an appropriate blend of the oils from storage receptacles A and B. Similarly, opening of valve 3| will cause proportioning devices 9 and M illustrated in Figures 1 and 2 that each of the proportioning devices may be adapted to transmit the two oils supplied to it 'in equal proportions and that when so arranged and where the oil stocks supplied to storage receptacles A and B correspond respectively to S. A. E. numbers 10 and 70, blends corresponding to S. A. E. num-' bers 20, 30, 40, 50 and 60 may be compounded from these) stocks and dispensed through valves 3|, 32, 33,14, and 35, respectively, by the operation of the apparatus as above described. This arrangement has 'the advantage that only one style or size of proportioning device is required to produce all. of the blends necessary to supply the usual trade requirements. It will of sponding inlet and discharge connections may be eliminated.

Similarly, if the trade requirements of a particular dealer do not warrant the production of blends corresponding to S. A. E. numbers 20 and 60, for example, storage tahks F and G and the corresponding proportioning devices 26 and 21 together with their associated inlet and discharge connections may be eliminated and the proportioning devices II and I5 synchronized to the required transmission ratio to produce directly blends corresponding to S. A. E. numbers 30 and 50, respectively from the lubricating stock supplied from A and theblend supplied from C in the one instance. and from the lubricating stock supplied from B and the blend supplied from C in'the other instance. Thus the proportioning device I may be synchronized to transmit through -its discharge connection a blend composed of 35% of oil supplied from connection 7 and 65% of oil supplied from connection l3, while proportioning device l5 may be synchronized to supply through discharge connecfrom connection 13 and 35% of oil supplied from connection 6.

Similarly, proportioning devices 26 and 21 may be directly connected through connections 31 and 40 to connections 1 and 8, respectively, and the. transmission ratio of these proportioning devices established, for example, to produce blends corresponding to S. A. E. numbers 30 and 50, respectively, while proportioning devices l4 and I5 may remain as shown with transmission-ratios established to produce blends corresponding to S. AZ E. numbers and 60 respectively, for example.

In theapparatus illustrated in Figure 3 storage receptacles A and B communicate through connections 1 and 8 with manifolds 4| and 42, respectively. The inlet side of one of the elements of each of the proportioning devices, 43, ll, l5, l6, and 1, is connected to manifold M while the inlet side of the other element of each of the proportioning devices is connected to the manifold 42. In the arrangement shown in this figure each of the proportioning devices has a diiiercnt liquid transmission ratio. For example, the elements of proportioning device 43 may be synchronized to transmit to discharge connection 48, a blend consisting of 80% of oil supplied from receptacle A and'20% of oil supplied from receptacle B. Proportioning device 54 may be arranged to transmit to discharge connection, a blend comprising 65% of oil supplied from receptacle A and 35% of oil supplied from receptacle B. Proportionlng device 65 may be arranged to transmit to discharge connection 50 a blend consisting 01' 50% 01 oil supplied from receptacle A and 50% of oil supplied from receptacle B. Proportioning devices 66 and 41 may be arranged to transmit to discharge connections 5| and 52, respectively, blends of oils-from receptacles A and B in proportions corresponding inversely to the proportions transmitted by proportioning devices 44 and 43, respectively. With the arrangement above described and with oils corresponding to S. A. E. numbers 10 and 70 in storage receptacles A and B respectively, oils having physical properties corresponding to the recognized S. A. E. numbers 20, 30, 40, 50 and 60 may be compounded and dispensed directly through connections 48,", 50, 5|, and 52. It will of course be appreciated that where the trade requirements do not provide a suflicient demand for one or more In the apparatus illustrated in Figure 3 storage receptacles A and B are shown as provided with, connections 53 and 54 for supplying air under pressure and with relief valves 55 and 56. It will of course be understood, if receptacles A and B are elevated with respect to the exit end of the discharge connections, that these receptacles may be provided with vents as illustrated in Figure 1 and the oil permitted to feed by gravity through the corresponding'manfl'olds ll and 42. Likewise, proportioning devices 43 to 41 in this arrangement may be driven by the application of external force. For example, where the storage receptacles A and B cannot advantageously be elevated and where a. source of compressed air or other gaseous medium is not readily available,

so that oil will be drawn from receptacles A and B, through discharge connections 1 and 8, manifolds II and. 42, and the corresponding inlets to any one of the desired proportioning devices.

Similarly, it will be obvious that the proportioning devices may be arranged to discharge into corresponding intermediate storage tanks, as in the arrangement illustrated in Figure 1, so that a limited supply of the various intermediate rades of oil will be available at all times.

The apparatus illustrated in Figure 4 illustrates a practical compact arrangement or the apparatus illustrated in Figure Bsvhich is particularly adapted for small scale installations such as might be required by the small service station operator. In the arrangement shown in Figure 4 the corresponding parts are numbered the same as in Figure 3 and the arrangement shown is-such that if oils corresponding to S. A. E. numbers and 70 are supplied to storage receptacles A and B respectively, oils corresponding to S. A.- E. numbers 10, 20, 30, 40, 50, 60, and 70 may weather.-

In the apparatus illustrated in Figure 4, as in the case of the apparatus illustratedin Figure 3,

it will be obvious that the number of proportion- .ing elements may be decreased or increased and the transmission ratios of the various proportioning devices varied in accordance with the number and kinds of oil-it is desired to dispense taking into consideration the lubricating oil stocks available. Other modifications of the apparatus of the invention will be apparent to those skilled in the art from the foregoing description.

Figures 5 and 6 illustrate, respectively, a reciprocating and a rotary type of proportioning device. In the reciprocating type of proportioning device illustrated in Figure 5 pistons 66 and 61 driven by motor 58 through a common crankshaft operate to draw the liquids to be blended throughinlet connections 60 and GI, respectively, and to discharge them through the single outlet connection 62. In the apparatus illustrated in this 118- ure the diameter of piston G1 is considerably less than that of piston 68. The size of the cylinder in which the piston 61 operates is reduced by sleeve 65.. A similar reduction in the displacement of the right hand proportioning element could be obtained by reducing the throwof the crank 6i as compared to the throw of the crank 63.

Inthe proportioning device illustrated in Figure 6 the rotating members may be of the well known lobe or well known gear type. In the apparatus illustrated the ratio of the relative speeds of rotation is controlled by the ratio of the meshing gears I! and I4. In this type of' proportioning device the rotating element may be driven by motor 15 so' as to draw the liquids to be blended through inlet connections Ill and H and to discharge the blended liquids through the common connection 12. In the gear type of rotary proportioning device illustrated in Figure 6, the motor I5 may be dispensed with entirely if the liquid is supplied under pressure to either or both of connections Ill and II.

I claim:

1. In an apparatus of the class described the combination comprising two storage receptacles, a plurality of pairs ofv positive displacement proportioning elements the elements of each pair being synchronized to transmit liquids in a dif-- ferent predetermined flxed ratio, a manifold communicating with one of said storage receptaclesand with the inlet side of one of the elements of .each of the pairs of proportioning elements, a sec- 1 0nd manifold communicating. with the other storage receptacle and with the inlet side of the other element of each of the pairs of proportioning elements, and separate means for uniting liquids discharged from each of said pairs of proportioning elements.

2. In an apparatus of the class described the combination comprising two, storage receptacles each provided with a valvecontrolled discharge receive both liquids discharged by one of said pairs m of proportioning elements.

3. In an apparatus of the class described the combination comprising two storage receptacles each provided with a valve controlled discharge tacle and with the inlet side of the other elements of each of the pairs of proportioning elements, means adapted to apply pressure to said storage receptacles, and a plurality of valve controlled discharge connections each adapted to receive both liquids discharged by one of said pairs of proportioning elements.

4. In an apparatus of the class described the combination comprising two storage receptacles each provided with a valve controlled discharge connection, a plurality of pairs of positive displacement proportioning elements the elements of each pair being synchronized to transmit liquids in a diii'erent predetermined fixed ratio, said proportioning elements being operable by the intro- 'duction of liquidsunder pressure to the inlet sides thereof, a manifold communicating with one of said storage receptacles and with the inlet side ofone of the elements of each of the pairs of proportioning elements, a second manifold communicating with the other storage receptacle and with the inlet side of the other element of each of the pairs of proportioning elements, and a plurality of valve controlled discharge connections each adapted to receive both liquids discharged .by one of said pairs' of proportioning elements,

said storage receptacles being elevated with respect to the exit ends of said discharge connections.

5. In an apparatus of the class described the combination comprising two storage receptacles, a plurality of pairs of positive displacement proportioning elements the elements of each pai r being synchronizedto transmit liquids in a'Idifierer'itQ-predetermined fixed ratio, said pro- 1 portioning' elements being operable by the introduc'tion'of liquids under pressure to the inlet sides thereof, a manifold communicating with one of said storage receptacles and with the inlet side-of. the elements of each of the pairs-'7 oi proportioning elements, a second manifold nections between one ofthe storage receptaclescommunicating with the other storage receptacle and with'the' inlet side of the other element of each of the pairs of proportioning elements. means for supplying liquid from said storage receptacles to the inlet sides of the proportioning elements under pressure, and a plurality of valve controlled discharge connections each adapted to receive both liquids discharge by one of said pairs of proportioning elements. I

6. In an apparatus of the class described the combination comprising two storage receptacles, a plurality of proportioning devices including a first and a second proportioning device each comprising two positive displacement proportioning elements synchronized to transmit liquids in a predetermined fixed ratio and a discharge connection adapted to receive liquid transmitted by said proportioning elements, connections between one of the storage receptacles and the inlets of one of the proportioning elements oi the first and the second of said proportioning devices, a connection between the other storage receptacle and the inlet of the other proportioning element of the first proportioning device, and a connection between the discharge connection of the first proportioning device and the inletof the other element of the second proportioning device. '7. In angapparatus of the class described the combination comprising two storage receptacles receptacles and the inlets of one of the proportioning elements of the first and the second of said proportioning devices, a connection between the other storage receptacle and the inlet .of the other proportioning element of the first proportioning device and a branch connection between the discharge connection of the first proportioning device andthe inlet of the other element. of the second proportioning device.

8. In an apparatus of the class described the combination comprising two storage receptacles,

a plurality of proportioning devices includ-' ing a first and a second proportioning device each;

comprising two positive displacement proportioning elements synchronized to transmit liquids in equal proportions and a discharge connection adapted to receive liquid transmitted by said the'inlet' oi the other proportioning element of proportioning elements, connections between one of the storage receptacles and the inlets'of one of the proportioningelements of the first and the second of said proportioning devices, a connection between the other storage receptacle and the inlet of the other proportioning element of the first proportioning device, and a connection between the discharge connection of the first proa plurality of proportioning devices including a f first, a second and a third proportioning device each comprising two positive displacement proportioning elements synchronized to transmit liqulds'in a predetermined fixed ratio and a discharge connection adapted to receive liquid transmitted by said proportioning elements, conand the inlets of one of the proportioning elements of the first and the second of said proportioning devices, a connection between the other storage receptacle and the inlet of the other proportioning element of the first proportioning device, connections between the discharge connection of the first proportioning device and the inlet of the other proportioning element of the second proportioning device and the inlet of one element of a third proportioning device, and a connection of the second proportioning device 'and the inlet of the other element of the third proportioning device.

10. In an apparatus of the class described the combination comprising two storage receptacles, a. plurality of proportion devices including a first, a second and a third proportioning device each comprising two positive displacement proportioning elements synchronized to transmit liquids in equal proportions and a discharge connection adapted to receive liquid transmitted by said proportioning elements, connections between one of the storage receptacles and the inlets of one of the proportioning elements of the first and the second of said proportioning devices, a connection between the other storage receptacle and the.inlet of the other proportioning element of the first proportioning device, connections between the discharge connection of the first proportioning device and the inlet of the other proportioning element of the second proportioning device, and the inlet of one element of a third proportioning device, and a connection betweenthe discharge connection of the second propor tioning device and the inlet of the other element of the third proportioning device.

11. In an apparatus of the class described the combination comprising two storage receptacles each provided with a valve controlled discharge connection, a plurality of proportioning devices including a first, a second and a third proportioning device each comprising two positive displacement proportioning elements synchronized to transmit liquids in a predetermined fixed ratio and a valve controlled discharge connection adapted to receive liquid transmitted by said proportioning elements, branch connections between one of the storage receptacles and the inlets of one of the proportioning elements of the first and the second of said proportioning de vices, a branch connection between the other the second proportioning device and the inlet of. one element of a third proportioning device, and a branch connection between the discharge connection of the second proportioning device and the inlet of the other element of the third proportioning device.

Y 12. In an apparatus of the classdescribed the combination comprising two storage receptacles, a plurality oi proportioning devices including a first and a second proportioning device each 'two positive displacement propornts synchronized'to transmit liqa a etermined fixed ratio and a valve contro, *discharge connection adapted to receiveliquid transmitted bysaid proportioning elements, said proportioning elements being operable by the introduction of liquid under pres-. sure to the inlet sides thereof, connections be tweenthestorsgereeeptaclesandtheinletsoi one at the elements oi the first and the second or said devices, a connection betweenthe other storige receptacle receptacles and with each 01' said intermediate storage tanks.

14. In an apparatus of the class described the combination comprising two storage receptacles,

cwfficfis or CORRECTION;

l and the inlet of the other woportioning element a plurality oi proportioning devices including a s of the first proportioning device, a branch confirst, a second and a third proportioning device nection between the discharge connection oi the each comprising two positive displacement pro first device and the inlet of the portioning elements synchronized to transmit other element or the second proportioning 'deliquids in a predetermined fixed ratio and a disl vice, and means for applying pressure to liquid charge connection adapted to receive liquid in the storage receptacles; v transmitted by said proportioning elements, a,

13. In an apparatus oi the class described the plurality of intermediate storage tanks each arcombination comprising two storage receptacles, ranged to communicate through said discharge a pluralityot ps'oportioning devices including a connections with one of said proportioning dell first and a second proportioning device each vices, connections between one of the storage recomprising two pofltive displacement proporceptacles and-the inlets ,0! one of the proportion.-

tioning elements synchronized to transmit liqingelements oi the first and the second of said 'uid in a predetermined fixed ratio and a valve proportioning devices, a. connection between the controlled discharge connection adapted to reother storage receptacle and the inlet of the ceive liquid transmitted by said proportioning other proportioning element of the first propor- 20 elements, a plurality of intermediate storage tioning device, connections between the intertanks each arranged to communicate through mediate storage tank communicating with the said discharge connections with one of said 'profirst proportioning device and the inlet of the 90111011108 m c nnections between one of other proportioning element of the second pro-I esthe storage receptacles and the inlets 0! one of portioning device and the inlet of one element the proportioning elements 0! the first and, the ot a third proportioning device, a connection be-- second at said proportioning devices, a connectween the intermediate storage tank communitlo'n between the other storage receptacle and the eating with. the second proportioning device and inlet of the other proportioning element of the the inlet or the other element of a third profirst device, a connection between portioning device, and separate valve controlled 30 the hm -8 tank-8 unicating discharge connections communicating with each with the device and the inlet of said storage receptacles and'each or said inof the other element of the second proportiontermediate storage tanks.

' ing device, and separate valve controlled connec- 36 tions ting with each of said storage. CLIVE MORRIS ALEXANDER.

Patent No. 2,051,932. August 25, 1936.

.cmvs norms ALEXANDER,

It is hereby certified that error appears in the printed Specification 'of the above numbered patent requiring correction as follows: Page 5, first co1umn, -11ne 9, claim-'5, for the word 'di's'charge" read discharged; line 38,

claim 7 for"- "transmitting! read transmitted; same page, second column, line 12, claim 9, after 'fconnection insert the words between the discharge connection; line 17, claim 10, for "proportion" read proportioning and that the said Letters Patent shouldbe. readwith these corrections therein that the I same may conform to the record of the case in the Patent Office'.

Signed and sealed this 3rd day of November, A. D. 1936.

Henry Van Arsdale Acting Commissioner of-Patents.

tweenthestorsgereceptaclesandtheinletsoi one ot theproportioning elements oi the firstv andtheseeondotsaidproportioningdevices,a connection betweenthe other storige receptacle receptacles and with each 01' said intermediate storage tanks.

14. In an apparatus of the class described the combination comprising two storage receptacles,

swimmer CORRECTION;

s and the inlet of the other woportioning element a plurality oi proportioning devices including a s o! the first proportioning device, a branch confirst, a second and a third proportioning device nection between the discharge connection oi the each comprising two positive displacement pro first proportioning device and the inlet or the portioning elements synchronized to transmit other element or the second proportioning 'deliquids in a predetermined fixed ratio and a disl vice, and means for applying pressure to liquid charge connection adapted to receive liquid in the storage receptacles; v transmitted by said proportioning elements, a,

13. In an apparatus oi the class described the plurality of intermediate storage tanks each arcombination comprising two storage receptacles, ranged to communicate through said discharge a pluralityot proportioning devices including a connections with one of said proportioning dell first and a second proportioning device each vices, connections between one of the storage recomprising two pofltive displacement proporceptacles and-the inlets ,0! one of the proportion.-

tioning elements synchronized to transmit liqingelements oi the first and the second of said 'uid in a predetermined fixed ratio and a valve proportioning devices, a. connection between the controlled discharge connection adapted to reother storage receptacle and the inlet of the ceive liquid transmitted by said proportioning other proportioning element of the first propor- 20 elements, a plurality of intermediate storage tioning device, connections between the intertanks each arranged to communicate through mediate storage tank communicating with the said discharge connections with one of said 'profirst proportioning device and the inlet of the 90111011108 m c nnections between one of other proportioning element of the second pro-I esthe storage receptacles and the inlets of one of portioning device and the inlet of one element the proportioning elements 0! the first and, the ot a third proportioning device, a connection be-- second at said proportioning devices, a connectween the intermediate storage tank communitlo'n between the other storage receptacle and the eating with. the second proportioning device and inlet of the other proportioning element of the the inlet or the other element of a third profirst proportioning device, a connection between portioning device, and separate valve controlled 30 the hm -8 tank-8 unicating discharge connections communicating with each with the device and the inlet of said storage receptacles and'each or said inof the other element of the second proportiontermediate storage tanks.

' ing device, and separate valve controlled connec- 36 tions communicating with each of said storage. CLIVE MORRIS ALEXANDER.

Patent No. 2,051,932. August 25, 1936.

.cL vE norms Amman,

It is hereby certified that error appears in the printed Specification 'of the above numbered patent requiring correction as follows: Page 5, first c01umn, -11ne 9, claim-'5, for the word 'di's'charge" read discharged; line 38,

claim 7 for"- "transmitting! read transmitted; same page, second column, line 12, claim 9, after 'fconnection insert the words between the discharge connection; line 17, claim 10, for "proportion" read proportioning; and that the said Letters Patent shouldbe. readwith these corrections therein that the I same may conform to the record of the case in the Patent Office'.

Signed and sealed this 3rd day of November, A. D. 1936.

Henry Van Arsdale Acting Commissioner of-Patents. 

